Computer monitor



FIG. 1 is a top right, front perspective view of a computer monitor showing my new design;

FIG. 2 is a top, rear perspective view of the computer monitor of FIG. 1, showing my new design; and,

FIG. 3 is a right side elevation view of the computer monitor of FIG. 1, showing my new design, the left side elevation view being a mirror image thereof.

The base is shown in broken lines in the views for illustrative purposes only and form no part of the claimed design, and the pattern shown on the monitor is understood to represent a conventional material. 

I claim the ornamental design for a computer monitor, as shown and described. 